COLOMBIA. Banco de la República de Colombia. 5 Pesos Oro. July 20, 1927. P-376sp. Specimen.A beautiful green face type that is difficult to find in Specimen or issued form. Red zero serial numbers, though not stamped “SPECIMEN” on the face. Referred to as “Specimen Proof” by PMG and similar to lot 10046 in Eldorado 1, which realized a strong $1,920 in January 2018. This is just as sharp and desirable.